Netstat rrd error updating

[Epp, Matthew Contractor PEO EIS AKO]

Searched the archives and found other mentions of this error but no
solution. I have a Solaris 8 server with the Hobbit client reporting to the
Hobbit server, and everything works except the netstat trend graph. I made
sure Hobbit generates the netstat.rrd file itself, and verified that it has
the correct fields:

$ rrdtool dump netstat.rrd |grep "<name>"

                <name> udpInDatagrams </name>
                <name> udpOutDatagrams </name>
                <name> udpInErrors </name>
                <name> tcpActiveOpens </name>
                <name> tcpPassiveOpens </name>
                <name> tcpAttemptFails </name>
                <name> tcpEstabResets </name>
                <name> tcpCurrEstab </name>
                <name> tcpOutDataBytes </name>
                <name> tcpInInorderBytes </name>
                <name> tcpInUnorderBytes </name>
                <name> tcpRetransBytes </name>
                <name> tcpOutDataPackets </name>
                <name> tcpInInorderPackets </name>
                <name> tcpInUnorderPackets </name>
                <name> tcpRetransPackets </name>

But viewing a debug output of rrd-data.log shows that something is making it
think there should only be 11 fields:

2006-10-13 19:18:18 Want msg 667, startpos 66490, fillpos 66490, endpos -1,
usedbytes=0, bufleft 461893
2006-10-13 19:18:22 hobbitd_rrd: Got message 667
@@data#667|1160767102.598295|10.x.x.x||x.x.x.x|netstat
2006-10-13 19:18:22 startpos 72703, fillpos 72703, endpos -1
2006-10-13 19:18:22 RRD update param 00: 'rrdupdate'
2006-10-13 19:18:22 RRD update param 01:
'/cust/bbh/data/rrd/x.x.x.x/netstat.rrd'
2006-10-13 19:18:22 RRD update param 02: '-t'
2006-10-13 19:18:22 RRD update param 03:
'udpInDatagrams:udpOutDatagrams:udpInErrors:tcpActiveOpens:tcpPassiveOpens:t
cpAttemptFails:tcpEstabResets:tcpCurrEstab:tcpOutDataBytes:tcpInInorderBytes
:tcpInUnorderBytes'
2006-10-13 19:18:22 RRD update param 04:
'1160767102:1580411:5594723:0:113952:19256340:17330:36082:7:653169856:440119
035:9398449:159635980:26380336:13186666:30559:612744'
2006-10-13 19:18:22 RRD error updating
/cust/bbh/data/rrd/x.x.x.x/netstat.rrd from x.x.x.x: expected 11 data source
readings (got 16) from
1160767102:1580411:5594723:0:113952:19256340:17330:36082:7:653169856:4401190
35:9398449:159635980:26380336:13186666:30559:612744:...


Where is "param 03" coming from? From some configuration on the client side?